A hand-held, mains electricity (AC-powered) dental device that includes a chuck or collet for attaching a rotary dental endpiece (e.g., drills, burs, reamers) intended to be used in dentistry to bore/excavate bones, teeth, and tough tissues. It is powered by a low-voltage electric micro-motor (e.g., 24 volt) that is an integral part of the device; the endpiece(s) are not included. It is typically connected through the dental delivery system or a freestanding independent control unit. This is a reusable device.